Product Details

Sealing in Class I Areas

Overview/Description

This self-paced online training course covers the purpose and application of cable and conduit seals in Class I areas. Sealing requirements differ for conduits and cables and differ somewhat for different types of cables.

Upon completion you should be able to:

Explain the four general purposes of conduit and cable seals serve in Class I areas

Identify how pressure piling occurs and how to reduce it

List and explain three areas where conduit seals must be located

Identify the most likely place for an explosion to be initiated in the electrical system

List and explain installation requirements that apply to all conduit seals

Explain how and why cables and conduits behave differently in the event of fire or explosion

Conduit and cable seals are required in Class I areas to minimize the passage of gases and vapors within the electrical installation, to prevent the passage of flames from one part of the electrical installation to another, and to complete the enclosure system.

In addition, seals are used to break the overall enclosure system into smaller parts to help reduce the extent of internal explosions and reduce the high pressures associated with pressure piling.

Sealing requirements differ for conduits and cables and differ somewhat for different types of cables because of the differences in the ease of entry of gases and vapors into conduits and cables and the ease of transmission of gases and vapors through conduits and cables.